Parabolic surface structure type deployable antenna mechanism based on scissor hexagonal prism unit

Abstract

The application relates to a parabolic frame type deployable antenna mechanism based on a scissor type hexagonal platform unit, which comprises a plurality of scissor type hexagonal platform deployable units, adjacent top inner flower discs in each scissor type hexagonal platform deployable unit are connected through upper synchronous rods, adjacent bottom inner flower discs are connected through lower synchronous rods, adjacent top inner flower discs and bottom inner flower discs are connected through scissor rods, outer flower discs are correspondingly arranged outside each bottom inner flower disc, adjacent outer flower discs are connected through outer synchronous rods, the top inner flower discs and the outer flower discs are connected through belly rods, the bottom inner flower discs and the belly rods are connected through bottom rods, three connections are arranged between adjacent two scissor type hexagonal platform deployable units, the adjacent two scissor type hexagonal platform deployable units are connected through connecting pieces, lower connecting rods and upper connecting rods. The antenna mechanism has only one degree of freedom, can form a super-large deployable antenna with any caliber, and has the advantages of high rigidity, strong stability and high folding rate.

Description

Technical Field

[0001] This invention belongs to the field of unfolding mechanism technology, and specifically relates to a parabolic frame unfoldable antenna mechanism based on a scissor-type hexagonal frustum unit. Background Technology

[0002] Large spaceborne antennas are limited by the rocket's volume during launch, requiring them to be folded up and deployed after entering orbit before entering operational status. To meet the growing needs of deep space exploration, the demand for deployable antennas with high deflection ratio, high stiffness, and high stability is becoming increasingly urgent. Frame-type deployable antennas, due to their high stiffness and ease of ensuring surface accuracy, have become an important form for achieving large-aperture, high-precision antennas.

[0003] Chinese Patent Publication No. CN107134655A proposes a spatially deployable curved truss mechanism based on a scissor mechanism, which is formed by a network of multiple triangular frustum units. Adjacent triangular frustum units are connected by a shared scissor bar. This mechanism has the advantages of large size and high strength, but the uniformity of the components is poor after fitting a parabolic surface. Chinese Patent Publication No. CN108847518A proposes a spiderweb-like spatially deployable mechanism based on scissor units. Five scissor-deployable units are arranged in a ring array on the same base to form a closed-loop spatial folding and unfolding mechanism. This invention has one degree of freedom, requires few drives, and is simple to control, but its scalability is poor. The unfolding ratio, weight, and stability are important indicators for evaluating the performance of spatially deployable mechanisms. Therefore, it is necessary to develop spatially deployable antenna mechanisms with a large unfolding ratio, light weight, and high stiffness. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides a parabolic frame deployable antenna mechanism based on a scissor-type hexagonal frustum unit. This deployable antenna mechanism unit has only one degree of freedom, and the overall structure has the advantages of simple structure, easy control of the deployment process, uniform rod length distribution, high stiffness, high stability and high collapse rate. It can form a parabolic reflector frame deployable antenna mechanism of arbitrary size and curvature.

[0005] The technical solution adopted in this invention is a parabolic frame deployable antenna mechanism based on scissor-type hexagonal frustum units, which includes multiple scissor-type hexagonal frustum deployable units, a connector, a lower connecting rod, and an upper connecting rod connecting the multiple scissor-type hexagonal frustum deployable units.

[0006] Each of the scissor-type hexagonal truncated pyramid deployable units includes six outer flower plates, six top inner flower plates, six bottom inner flower plates, six pairs of equal-length scissor bars, six equal-length web bars, six pairs of upper synchronizing bars, six pairs of lower synchronizing bars, six pairs of outer synchronizing bars, and six equal-length base bars. The six top inner flower plates are arranged in a regular hexagonal pattern at the top of the scissor-type hexagonal truncated pyramid deployable unit, and adjacent pairs of top inner flower plates are connected by upper synchronizing bars. Each pair of upper synchronizing bars can be folded inwards. The six bottom inner flower plates are arranged in a regular hexagonal pattern at the bottom of the scissor-type hexagonal truncated pyramid deployable unit, and adjacent pairs of bottom inner flower plates are connected by lower synchronizing bars. Each pair of lower synchronizing bars can be folded inwards. The top inner flower plate is connected to two adjacent bottom inner flower plates by a pair of scissor rods. The six outer flower plates are arranged in a regular hexagonal shape on the outside of each bottom inner flower plate, and the outer flower plates and the bottom inner flower plates are located on the same plane. The two adjacent outer flower plates are connected by the outer synchronous rods, and each pair of outer synchronous rods can be folded inward. The six top inner flower plates are connected to the six outer flower plates by the web rods, and the six bottom inner flower plates are connected to the web rods by the bottom rods. The outer flower plates, top inner flower plates, bottom inner flower plates, scissor rods, web rods, upper synchronous rods, lower synchronous rods, outer synchronous rods, and bottom rods are correspondingly connected to form a scissor-type hexagonal frustum deployable unit.

[0007] Multiple connections are provided between the two adjacent scissor-shaped hexagonal frustum deployable units. The outer flower plate on the inner side of the first scissor-shaped hexagonal frustum deployable unit and the outer flower plate on the inner side of the second scissor-shaped hexagonal frustum deployable unit are connected by the connecting member. The scissor-shaped hexagonal frustum deployable units can rotate around the connecting shaft in the adjacent connecting member. Both ends of the lower connecting rod and the upper connecting rod are provided with universal joint connectors. Both ends of the lower connecting rod are connected to the outer flower plate on the outer side of the two adjacent scissor-shaped hexagonal frustum deployable units through the universal joint connectors. Both ends of the upper connecting rod are connected to the inner top flower plate on the inner side of the two adjacent scissor-shaped hexagonal frustum deployable units through the universal joint connectors.

[0008] Preferably, each top inner flower plate and each bottom inner flower plate are provided with a middle inner branch, a first inner branch and a second inner branch. The middle inner branch is provided with an inner groove, and the first inner branch and the second inner branch are symmetrically provided on both sides of the middle inner branch. The included angle between the first inner branch and the second inner branch and the middle inner branch is 120°, and the first inner branch and the second inner branch are provided with a first inner groove and a second inner groove.

[0009] Preferably, each pair of upper synchronizing rods includes a first upper synchronizing rod and a second upper synchronizing rod, with the first end of the first upper synchronizing rod and the first end of the second upper synchronizing rod rotatably connected. The second end of the first upper synchronizing rod is rotatably connected to the first inner groove on the first inner branch of the top inner flower plate, and the second end of the second upper synchronizing rod is rotatably connected to the first inner groove on the second inner branch of the adjacent top inner flower plate. Each pair of lower synchronizing rods includes a first lower synchronizing rod and a second lower synchronizing rod, with the first end of the first lower synchronizing rod and the first end of the second lower synchronizing rod rotatably connected. The second end of the first lower synchronizing rod is rotatably connected to the first inner groove on the first inner branch of the bottom inner flower plate, and the second lower synchronizing rod is rotatably connected to the first inner groove on the first inner branch of the bottom inner flower plate. The second end of the rod is rotatably connected to the first inner groove on the second inner branch of the adjacent bottom inner flower plate; each pair of scissor bars includes a first scissor bar and a second scissor bar, and the middle part of the first scissor bar is rotatably connected to the middle part of the second scissor bar, the first end of the first scissor bar is rotatably connected to the second inner groove on the first inner branch of the top inner flower plate, and the second end of the first scissor bar is rotatably connected to the second inner groove on the second inner branch of the adjacent bottom inner flower plate, the first end of the second scissor bar is rotatably connected to the second inner groove on the second inner branch of the top inner flower plate, and the second end of the second scissor bar is rotatably connected to the second inner groove on the first inner branch of the adjacent bottom inner flower plate.

[0010] Preferably, each outer flower plate is provided with a middle outer branch, a first outer branch, a second outer branch, a first lug, and a second lug. The first outer branch and the second outer branch are symmetrically provided on both sides of the middle outer branch, and the included angle between the first outer branch and the second outer branch and the middle outer branch is 60°. The middle outer branch, the first outer branch, and the second outer branch are all provided with an outer groove. The first outer branch and the second outer branch are respectively provided with a first lug and a second lug, and the included angle between the first outer branch and the first lug is 90°, and the included angle between the second outer branch and the second lug is 60°.

[0011] Preferably, each pair of outer synchronizing rods includes a first outer synchronizing rod and a second outer synchronizing rod, with the first end of the first outer synchronizing rod and the first end of the second outer synchronizing rod rotatably connected. The second end of the first outer synchronizing rod is rotatably connected to the outer groove on the first outer branch of the outer flower plate, and the second end of the second outer synchronizing rod is rotatably connected to the outer groove on the second outer branch of the adjacent outer flower plate. The first end of each belly rod is rotatably connected to the inner groove on the middle inner branch of the corresponding top inner flower plate, and the second end of each belly rod is rotatably connected to the outer groove on the middle outer branch of the corresponding outer flower plate. The first end of each bottom rod is rotatably connected to the middle part of the corresponding belly rod, and the second end of each bottom rod is rotatably connected to the inner groove on the middle inner branch of the corresponding bottom inner flower plate.

[0012] Preferably, the axis of rotation connecting each pair of scissor lifts and the top inner disc coincides with the axis of rotation connecting each pair of upper synchronizing rods and the top inner disc, and the axis of rotation connecting each pair of scissor lifts and the bottom inner disc coincides with the axis of rotation connecting each pair of lower synchronizing rods and the bottom inner disc.

[0013] Preferably, the connector includes a connecting block, three connecting shafts, a first support base and a second support base. The three connecting shafts are arranged in an equilateral triangle and are respectively arranged along the long side of the connecting block. The first ends of the first support base and the second support base are rotatably connected to the connecting shafts.

[0014] Preferably, the second lug of the outer disc on one of the two adjacent scissor-type hexagonal truncated display units is fixedly connected to the second end of the first support seat in the connector, and the second lug of the outer disc on the other of the two adjacent scissor-type hexagonal truncated display units is fixedly connected to the second end of the second support seat in the connector.

[0015] Preferably, the universal joint connector includes a first hinge seat, a second hinge seat, and a cross shaft, and the first hinge seat and the second hinge seat are rotatably connected through the cross shaft.

[0016] Preferably, each pair of lower connecting rods includes a first lower connecting rod and a second lower connecting rod, with the first end of the first lower connecting rod and the first end of the second lower connecting rod rotatably connected. The second end of the first lower connecting rod is fixedly connected to the first hinge seat in the universal joint connector, and the second hinge seat in the universal joint connector is fixedly connected to the first lug of the outer disc on the first scissor-shaped hexagonal frustum deployable unit in the two adjacent scissor-shaped hexagonal frustum deployable units. The second end of the second lower connecting rod is fixedly connected to the first hinge seat in the universal joint connector, and the second hinge seat in the universal joint connector is fixedly connected to the first lug of the outer disc on the second scissor-shaped hexagonal frustum deployable unit in the two adjacent scissor-shaped hexagonal frustum deployable units. Ear-fixed connection; each pair of upper connecting rods includes a first upper connecting rod and a second upper connecting rod, and the first end of the first upper connecting rod and the first end of the second upper connecting rod are rotatably connected, the second end of the first upper connecting rod is fixedly connected to the first hinge seat in the universal joint connector, and the second hinge seat in the universal joint connector is fixedly connected to the middle inner branch on the first scissor hexagonal frustum deployable unit in the two adjacent scissor hexagonal frustum deployable units, the second end of the second upper connecting rod is fixedly connected to the first hinge seat in the universal joint connector, and the second hinge seat in the universal joint connector is fixedly connected to the middle inner branch on the second scissor hexagonal frustum deployable unit in the two adjacent scissor hexagonal frustum deployable units.

[0017] The features and beneficial effects of this invention are:

[0018] 1. The present invention provides a parabolic frame deployable antenna mechanism based on scissor-type hexagonal frustum units, which is composed of multiple single-degree-of-freedom scissor-type hexagonal frustum deployable units. The connection between the components in a single scissor-type hexagonal frustum deployable unit is simple, and a scissor mechanism is used as the main structure, resulting in high overall structural rigidity and stability.

[0019] 2. The present invention provides a parabolic frame deployable antenna mechanism based on scissor-type hexagonal frustum units. The antenna mechanism is divided into surfaces based on hexagonal shapes. By designing scissor-type hexagonal frustum deployable units of different sizes, deployable antennas of arbitrary aperture and curvature can be realized. At the same time, the entire antenna mechanism structure is completely identical, which is convenient for processing and manufacturing.

[0020] 3. The present invention provides a parabolic frame deployable antenna mechanism based on a scissor-type hexagonal frustum unit, which has only one degree of freedom. The overall structure has the advantages of simple structure, easy control of the deployment process, uniform rod length distribution, high stiffness and high stability. When the antenna mechanism is retracted, the unit itself does not need to perform attitude adjustment movement. Appropriate adaptive attitude adjustment at the unit connection can achieve complete retraction of the antenna unit. The overall structure has the advantages of simple structure, easy control of the deployment process, uniform rod length distribution, high stiffness, high stability and high retraction efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the mechanism of the deployable scissor-type hexagonal frustum unit of the present invention;

[0022] Figure 2 This is a schematic diagram of the overall structure of the deployable antenna mechanism of the present invention;

[0023] Figure 3 This is a partially enlarged schematic diagram of the deployable antenna mechanism A of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the inner flower plate at the top of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the inner flower plate at the bottom of the present invention;

[0026] Figure 6 This is a schematic diagram showing the connection between the top inner flower plate, the scissor bar, the belly bar, the upper synchronizing bar, and the upper connecting bar of the present invention.

[0027] Figure 7 This is a schematic diagram of the structure of the outer flower plate of the present invention;

[0028] Figure 8This is a schematic diagram showing the connection between the outer flower plate, the web rod, the outer synchronizing rod, and the lower connecting rod of the present invention;

[0029] Figure 9 This is a schematic diagram showing the connection between the outer flower plates in two adjacent scissor-type hexagonal frustum deployable units of the present invention;

[0030] Figure 10 This is a schematic diagram of the structure of the connector of the present invention;

[0031] Figure 11 This is a schematic diagram of the universal joint connector of the present invention;

[0032] Figure 12 This is a three-dimensional structural diagram of the fully deployed antenna mechanism of the present invention from a frontal view.

[0033] Figure 13 This is a three-dimensional structural diagram of the deployable antenna mechanism of the present invention in a semi-deployed state;

[0034] Figure 14 This is a three-dimensional structural diagram of the fully retracted deployable antenna mechanism of the present invention.

[0035] Key reference numerals:

[0036] Outer flower plate 1; Middle outer branch 100; First outer branch 101; Second outer branch 102; First lug 103; Second lug 104; Outer groove 105; Top inner flower plate 2; Middle inner branch 200; First inner branch 201; Second inner branch 202; Inner groove 203; First inner groove 204; Second inner groove 205; Bottom inner flower plate 3; Scissor bar 4; First scissor bar 41; Second scissor bar 42; Belly bar 5; Upper synchronizing bar 6; First upper synchronizing bar 61; Second upper synchronizing bar 62; Outer synchronizing bar 7; First outer synchronous rod 71; Second outer synchronous rod 72; Bottom rod 8; Lower connecting rod 9; First lower connecting rod 91; Second lower connecting rod 92; Upper connecting rod 10; First upper connecting rod 1001; Second upper connecting rod 1002; Lower synchronous rod 17; First lower synchronous rod 171; Second lower synchronous rod 172; Connecting piece 18; Connecting block 181; Connecting shaft 182; First support seat 183; Second support seat 184; Universal hinge connector 19; First hinge seat 191; Second hinge seat 192; Cross shaft 193. Detailed Implementation

[0037] To fully describe the technical content, structural features, objectives, and effects of this invention, a detailed description will be provided below in conjunction with the accompanying drawings.

[0038] This invention provides a parabolic frame deployable antenna mechanism based on a scissor-type hexagonal frustum element, such as... Figures 1-3As shown, it includes multiple scissor-type hexagonal frustum deployable units and connectors 18, lower connecting rods 9 and upper connecting rods 10 that connect the multiple scissor-type hexagonal frustum deployable units.

[0039] like Figure 1 As shown, each deployable scissor-type hexagonal frustum unit includes six outer flower plates 1, six top inner flower plates 2, six bottom inner flower plates 3, six pairs of equal-length scissor bars 4, six equal-length web bars 5, six pairs of upper synchronizing bars 6, six pairs of lower synchronizing bars 17, six outer synchronizing bars 7, and six equal-length base bars 8. The six top inner flower plates 2 are arranged in a regular hexagonal shape at the top of the deployable scissor-type hexagonal frustum unit, and adjacent top inner flower plates 2 are connected by upper synchronizing bars 6. Each pair of upper synchronizing bars 6 can be folded inward. The six bottom inner flower plates 3 are arranged in a regular hexagonal shape at the bottom of the deployable scissor-type hexagonal frustum unit, and adjacent bottom inner flower plates 3 are connected by lower synchronizing bars 17. Each pair of lower synchronizing bars 17 can be folded inward. Two top inner flower plates 2 are connected to two adjacent bottom inner flower plates 3 by a pair of scissor rods 4. Six outer flower plates 1 are arranged in a regular hexagonal pattern on the outside of each bottom inner flower plate 3, and the outer flower plates 1 and the bottom inner flower plates 3 are located on the same plane. Two adjacent outer flower plates 1 are connected by an outer synchronous rod 7, and each outer synchronous rod 7 can be folded inward. The six top inner flower plates 2 are connected to the six outer flower plates 1 by a web rod 5, and the six bottom inner flower plates 3 are connected to the web rod 5 by a bottom rod 8. The outer flower plates 1, top inner flower plates 2, bottom inner flower plates 3, scissor rods 4, web rods 5, upper synchronous rods 6, lower synchronous rods 17, outer synchronous rods 7, and bottom rods 8 are connected in a corresponding manner to form a scissor-type hexagonal frustum deployable unit.

[0040] like Figure 4 and Figure 5 As shown, each top inner flower plate 2 and each bottom inner flower plate 3 are provided with a middle inner branch 200, a first inner branch 201 and a second inner branch 202. The middle inner branch 200 is provided with an inner groove 203, and the first inner branch 201 and the second inner branch 202 are symmetrically provided on both sides of the middle inner branch 200. The included angle between the first inner branch 201 and the second inner branch 202 and the middle inner branch 200 is 120°, and the first inner branch 201 and the second inner branch 202 are provided with a first inner groove 204 and a second inner groove 205.

[0041] like Figure 6As shown, each pair of upper synchronizing rods 6 includes a first upper synchronizing rod 61 and a second upper synchronizing rod 62. The first end of the first upper synchronizing rod 61 and the first end of the second upper synchronizing rod 62 are rotatably connected. The second end of the first upper synchronizing rod 61 is rotatably connected to the first inner groove 204 on the first inner branch 201 in the top inner flower plate 2. The second end of the second upper synchronizing rod 62 is rotatably connected to the first inner groove 204 on the second inner branch 202 in the adjacent top inner flower plate 2. Each pair of lower synchronizing rods 17 includes a first lower synchronizing rod 171 and a second lower synchronizing rod 172. The first end of the first lower synchronizing rod 171 and the first end of the second lower synchronizing rod 172 are rotatably connected. The second end of the first lower synchronizing rod 171 is rotatably connected to the first inner groove 204 on the first inner branch 201 in the bottom inner flower plate 3. The second end of the second lower synchronizing rod 172 is rotatably connected to the first inner groove 204 on the second inner branch 202 in the adjacent bottom inner flower plate 3. Each pair of scissor bars 4 includes a first scissor bar 41 and a second scissor bar 42. The middle part of the first scissor bar 41 is rotatably connected to the middle part of the second scissor bar 42. The first end of the first scissor bar 41 is rotatably connected to the second inner slot 205 on the first inner branch 201 in the top inner flower plate 2. The second end of the first scissor bar 41 is rotatably connected to the second inner slot 205 on the second inner branch 202 in the adjacent bottom inner flower plate 3. The first end of the second scissor bar 42 is rotatably connected to the second inner slot 205 on the second inner branch 202 in the top inner flower plate 2. The second end of the second scissor bar 42 is rotatably connected to the second inner slot 205 on the first inner branch 201 in the adjacent bottom inner flower plate 3.

[0042] like Figure 7 As shown, each outer flower plate 1 is provided with a middle outer branch 100, a first outer branch 101, a second outer branch 102, a first lug 103, and a second lug 104. The first outer branch 101 and the second outer branch 102 are symmetrically arranged on both sides of the middle outer branch 100, and the included angle between the first outer branch 101 and the second outer branch 102 and the middle outer branch 101 is 60°. The middle outer branch 100, the first outer branch 101, and the second outer branch 102 are all provided with an outer groove 105. The first lug 103 and the second lug 104 are respectively provided on the outer side of the first outer branch 101 and the second outer branch 102, and the included angle between the first outer branch 101 and the first lug 103 is 90°, and the included angle between the second outer branch 102 and the second lug 104 is 60°.

[0043] Specifically, the axis of rotation connecting each pair of scissor lifts 4 and the top inner disc 2 coincides with the axis of rotation connecting each pair of upper synchronizing rods 6 and the top inner disc 2, and the axis of rotation connecting each pair of scissor lifts 4 and the bottom inner disc 3 coincides with the axis of rotation connecting each pair of lower synchronizing rods 17 and the bottom inner disc 3.

[0044] like Figure 8As shown, each pair of outer synchronizing rods 7 includes a first outer synchronizing rod 71 and a second outer synchronizing rod 72. The first end of the first outer synchronizing rod 71 and the first end of the second outer synchronizing rod 72 are rotatably connected. The second end of the first outer synchronizing rod 71 is rotatably connected to the outer groove 105 on the first outer branch 101 in the outer flower plate 1. The second end of the second outer synchronizing rod 72 is rotatably connected to the outer groove 105 on the second outer branch 102 in the adjacent outer flower plate 1. The first end of each belly rod 5 is rotatably connected to the inner groove 203 on the middle inner branch 200 in the corresponding top inner flower plate 2. The second end of each belly rod 5 is rotatably connected to the outer groove 105 on the middle outer branch 100 in the corresponding outer flower plate 1. The first end of each bottom rod 8 is rotatably connected to the middle part of the corresponding belly rod 5. The second end of each bottom rod 8 is rotatably connected to the inner groove 203 on the middle inner branch 200 in the corresponding bottom inner flower plate 3.

[0045] like Figure 2 , Figure 3 and Figure 9 As shown, there are multiple connections between two adjacent scissor-shaped hexagonal frustum deployable units, with three connections in one specific embodiment. Furthermore, the outer flower plate 1 on the inner side of the first scissor-shaped hexagonal frustum deployable unit and the outer flower plate 1 on the inner side of the second scissor-shaped hexagonal frustum deployable unit are connected by a connector 18. The scissor-shaped hexagonal frustum deployable unit can rotate around the connecting shaft 182 in the adjacent connector 18. Both ends of the lower connecting rod 9 and the upper connecting rod 10 are provided with universal joint connectors 19. Both ends of the lower connecting rod 9 are connected to the outer flower plate 1 on the outer side of the two adjacent scissor-shaped hexagonal frustum deployable units via universal joint connectors 19, and both ends of the upper connecting rod 10 are connected to the inner top flower plate 2 on the inner side of the two adjacent scissor-shaped hexagonal frustum deployable units via universal joint connectors 19.

[0046] like Figure 10 As shown, the connector 18 includes a connecting block 181, three connecting shafts 182, a first support seat 183 and a second support seat 184. The three connecting shafts 182 are arranged in an equilateral triangle and are respectively arranged along the long side of the connecting block 181. The first ends of the first support seat 183 and the second support seat 184 are rotatably connected to the connecting shafts 182.

[0047] like Figure 9 and Figure 10 As shown, in the two adjacent scissor-type hexagonal truncated units, the second lug 104 of the outer flower plate 1 on the first scissor-type hexagonal truncated unit is fixedly connected to the second end of the first support seat 183 in the connector 18, and the second lug 104 of the outer flower plate 1 on the second scissor-type hexagonal truncated unit is fixedly connected to the second end of the second support seat 183 in the connector 18.

[0048] like Figure 11As shown, the universal joint connector 19 includes a first hinge seat 191, a second hinge seat 192 and a cross shaft 193, and the first hinge seat 191 and the second hinge seat 192 are rotatably connected by the cross shaft 193.

[0049] like Figure 2 , Figure 8 and Figure 11 As shown, each pair of lower connecting rods 9 includes a first lower connecting rod 91 and a second lower connecting rod 92. The first end of the first lower connecting rod 91 and the first end of the second lower connecting rod 92 are rotatably connected. The second end of the first lower connecting rod 91 is fixedly connected to the first hinge seat 191 in the universal hinge connector 19. The second hinge seat 192 in the universal hinge connector 19 is fixedly connected to the first lug 103 of the outer flower plate 1 on one of the two adjacent scissor-type hexagonal frustum deployable units. The second end of the second lower connecting rod 92 is fixedly connected to the first hinge seat 191 in the universal hinge connector 19. The second hinge seat 192 in the universal hinge connector 19 is fixedly connected to the first lug 103 of the outer flower plate 1 on the other of the two adjacent scissor-type hexagonal frustum deployable units.

[0050] like Figure 3 , Figure 6 and Figure 11 As shown, each pair of upper connecting rods 10 includes a first upper connecting rod 1001 and a second upper connecting rod 1002. The first end of the first upper connecting rod 1001 and the first end of the second upper connecting rod 1002 are rotatably connected. The second end of the first upper connecting rod 1001 is fixedly connected to the first hinge seat 191 in the universal hinge connector 19. The second hinge seat 192 in the universal hinge connector 19 is fixedly connected to the middle inner branch 200 on one of the two adjacent scissor-type hexagonal frustum deployable units. The second end of the second upper connecting rod 1002 is fixedly connected to the first hinge seat 191 in the universal hinge connector 19. The second hinge seat 192 in the universal hinge connector 19 is fixedly connected to the middle inner branch 200 on the other of the two adjacent scissor-type hexagonal frustum deployable units.

[0051] Example 1

[0052] This invention provides a parabolic frame deployable antenna mechanism based on a scissor-type hexagonal frustum element, such as... Figures 1 to 14 As shown, it includes three scissor-type hexagonal frustum deployable units and a connector 18, a lower connecting rod 9, and an upper connecting rod 10 connecting the three scissor-type hexagonal frustum deployable units.

[0053] like Figure 2 and Figure 3As shown, the first scissor-type hexagonal frustum deployable unit I, the second scissor-type hexagonal frustum deployable unit II, and the third scissor-type hexagonal frustum deployable unit III each include six outer flower plates 1, six top inner flower plates 2, six bottom inner flower plates 3, six pairs of equal-length scissor bars 4, six equal-length web bars 5, six pairs of upper synchronizing bars 6, six pairs of lower synchronizing bars 17, six outer synchronizing bars 7, and six equal-length bottom bars 8. The six top inner flower plates 2 are arranged in a regular hexagonal pattern on the top of the scissor-type hexagonal frustum deployable unit, and adjacent top inner flower plates 2 are connected by upper synchronizing bars 6. The six bottom inner flower plates 3 are arranged in a regular hexagonal pattern. The bottom of the scissor-type hexagonal frustum deployable unit is provided, and two adjacent bottom inner flower plates 3 are connected by a lower synchronous rod 17. Two adjacent top inner flower plates 2 are connected to two adjacent bottom inner flower plates 3 by a pair of scissor rods 4. Six outer flower plates 1 are arranged in a regular hexagon and are correspondingly located on the outside of each bottom inner flower plate 3. The outer flower plates 1 and the bottom inner flower plates 3 are located on the same plane. Two adjacent outer flower plates 1 are connected by an outer synchronous rod 7. The six top inner flower plates 2 are connected to the six outer flower plates 1 by a web rod 5. The six bottom inner flower plates 3 are connected to the web rod 5 by a bottom rod 8. There are three connections between the first scissor-type hexagonal frustum deployable unit I, the second scissor-type hexagonal frustum deployable unit II, and the third scissor-type hexagonal frustum deployable unit III. The outer flower plates 1 in two adjacent scissor-type hexagonal frustum deployable units are connected by connectors 18. Both ends of the lower connecting rod 9 and the upper connecting rod 10 are provided with universal hinge connectors 19. Both ends of the lower connecting rod 9 are connected to the outer flower plates 1 on the outer side of two adjacent scissor-type hexagonal frustum deployable units through universal hinge connectors 19. Both ends of the upper connecting rod 10 are connected to the inner top flower plates 2 on the inner side of two adjacent scissor-type hexagonal frustum deployable units through universal hinge connectors 19.

[0054] like Figure 12 , Figure 13 and Figure 14 As shown, the parabolic frame deployable antenna mechanism based on scissor-type hexagonal truncated pyramid units provided by the present invention has an outer flower plate 1 and a bottom inner flower plate 3 of a single scissor-type hexagonal truncated pyramid deployable unit on the same plane. The entire antenna mechanism can be completely folded up without the need for attitude adjustment of a single scissor-type hexagonal truncated pyramid deployable unit. Only an attitude adjustment mechanism needs to be added at the connection of the scissor-type hexagonal truncated pyramid deployable unit, and a drive is added at the central rotating joint of the scissor bar. At this time, the planes of each flower plate are basically consistent and horizontal, and each rod is close to each other, in the minimum envelope volume.

[0055] This invention discloses a parabolic frame deployable antenna mechanism based on scissor-type hexagonal frustum units. It is constructed by connecting multiple single-degree-of-freedom scissor-type hexagonal frustum deployable units. The connection method between components within a single scissor-type hexagonal frustum deployable unit is simple, and a scissor mechanism is used as the main structure, resulting in high overall structural rigidity and stability. Furthermore, by using a hexagonal shape to divide the antenna mechanism into sections, deployable antennas of arbitrary aperture and curvature can be achieved by designing scissor-type hexagonal frustum deployable units of different sizes. The entire antenna mechanism maintains a completely identical structure, facilitating processing and manufacturing. Moreover, when the antenna mechanism is retracted, the units themselves do not require attitude adjustment; appropriate adaptive attitude adjustment at the unit connections is sufficient to achieve complete retraction of the antenna units. This design offers advantages such as good structural symmetry, strong applicability, and high retraction efficiency.

[0056] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A deployable antenna mechanism based on a parabolic frame using a scissor-type hexagonal frustum element, characterized in that, It includes multiple scissor-type hexagonal frustum deployable units, a connector connecting the multiple scissor-type hexagonal frustum deployable units, a lower connecting rod, and an upper connecting rod. Each of the scissor-type hexagonal truncated pyramid deployable units includes six outer flower plates, six top inner flower plates, six bottom inner flower plates, six pairs of equal-length scissor bars, six equal-length web bars, six pairs of upper synchronizing bars, six pairs of lower synchronizing bars, six pairs of outer synchronizing bars, and six equal-length base bars. The six top inner flower plates are arranged in a regular hexagonal pattern at the top of the scissor-type hexagonal truncated pyramid deployable unit, and adjacent pairs of top inner flower plates are connected by upper synchronizing bars. Each pair of upper synchronizing bars can be folded inwards. The six bottom inner flower plates are arranged in a regular hexagonal pattern at the bottom of the scissor-type hexagonal truncated pyramid deployable unit, and adjacent pairs of bottom inner flower plates are connected by lower synchronizing bars. Each pair of lower synchronizing bars can be folded inwards. The top inner flower plate is connected to the two adjacent bottom inner flower plates by a pair of scissor rods. The six outer flower plates are arranged in a regular hexagonal shape on the outside of each bottom inner flower plate, and the outer flower plates and the bottom inner flower plates are located on the same plane. The two adjacent outer flower plates are connected by the outer synchronous rods, and each pair of outer synchronous rods can be folded inward. The six top inner flower plates are connected to the six outer flower plates by the web rods, and the six bottom inner flower plates are connected to the web rods by the bottom rods. The outer flower plates, top inner flower plates, bottom inner flower plates, scissor rods, web rods, upper synchronous rods, lower synchronous rods, outer synchronous rods, and bottom rods are correspondingly connected to form a scissor-type hexagonal frustum deployable unit. Multiple connections are provided between two adjacent scissor-shaped hexagonal frustum deployable units. The outer flower plate on the inner side of the first scissor-shaped hexagonal frustum deployable unit and the outer flower plate on the inner side of the second scissor-shaped hexagonal frustum deployable unit are connected by the connecting member. The scissor-shaped hexagonal frustum deployable unit can rotate around the connecting shaft in the adjacent connecting member. Both ends of the lower connecting rod and the upper connecting rod are provided with universal joint connectors. Both ends of the lower connecting rod are connected to the outer flower plate on the outer side of the two adjacent scissor-shaped hexagonal frustum deployable units through the universal joint connectors. Both ends of the upper connecting rod are connected to the inner top flower plate on the inner side of the two adjacent scissor-shaped hexagonal frustum deployable units through the universal joint connectors.

2. The parabolic frame deployable antenna mechanism based on a scissor-type hexagonal frustum unit according to claim 1, characterized in that, Each top inner flower plate and each bottom inner flower plate are provided with a middle inner branch, a first inner branch and a second inner branch. The middle inner branch is provided with an inner groove. The first inner branch and the second inner branch are symmetrically provided on both sides of the middle inner branch. The included angle between the first inner branch and the second inner branch and the middle inner branch is 120°. The first inner branch and the second inner branch are provided with a first inner groove and a second inner groove.

3. The parabolic frame deployable antenna mechanism based on a scissor-type hexagonal frustum unit according to claim 2, characterized in that, Each pair of upper synchronizing rods includes a first upper synchronizing rod and a second upper synchronizing rod, with the first end of the first upper synchronizing rod and the first end of the second upper synchronizing rod rotatably connected. The second end of the first upper synchronizing rod is rotatably connected to the first inner groove on the first inner branch of the top inner flower plate, and the second end of the second upper synchronizing rod is rotatably connected to the first inner groove on the second inner branch of the adjacent top inner flower plate. Each pair of lower synchronizing rods includes a first lower synchronizing rod and a second lower synchronizing rod, with the first end of the first lower synchronizing rod and the first end of the second lower synchronizing rod rotatably connected. The second end of the first lower synchronizing rod is rotatably connected to the first inner groove on the first inner branch of the bottom inner flower plate, and the second lower synchronizing rod... The second end is rotatably connected to the first inner slot on the second inner branch in the adjacent bottom inner flower plate; each pair of scissor bars includes a first scissor bar and a second scissor bar, and the middle part of the first scissor bar is rotatably connected to the middle part of the second scissor bar, the first end of the first scissor bar is rotatably connected to the second inner slot on the first inner branch in the top inner flower plate, and the second end of the first scissor bar is rotatably connected to the second inner slot on the second inner branch in the adjacent bottom inner flower plate, the first end of the second scissor bar is rotatably connected to the second inner slot on the second inner branch in the top inner flower plate, and the second end of the second scissor bar is rotatably connected to the second inner slot on the first inner branch in the adjacent bottom inner flower plate.

4. The parabolic frame deployable antenna mechanism based on a scissor-type hexagonal frustum unit according to claim 1, characterized in that, Each outer flower plate is provided with a middle outer branch, a first outer branch, a second outer branch, a first lug, and a second lug. The first outer branch and the second outer branch are symmetrically arranged on both sides of the middle outer branch, and the included angle between the first outer branch and the second outer branch and the middle outer branch is 60°. The middle outer branch, the first outer branch, and the second outer branch are all provided with an outer groove. The first outer branch and the second outer branch are respectively provided with a first lug and a second lug, and the included angle between the first outer branch and the first lug is 90°, and the included angle between the second outer branch and the second lug is 60°.

5. The parabolic frame deployable antenna mechanism based on a scissor-type hexagonal frustum unit according to claim 4, characterized in that, Each pair of outer synchronizing rods includes a first outer synchronizing rod and a second outer synchronizing rod, with the first end of the first outer synchronizing rod and the first end of the second outer synchronizing rod rotatably connected. The second end of the first outer synchronizing rod is rotatably connected to the outer groove on the first outer branch of the outer flower plate, and the second end of the second outer synchronizing rod is rotatably connected to the outer groove on the second outer branch of the adjacent outer flower plate. The first end of each web rod is rotatably connected to the inner groove on the middle inner branch of the corresponding top inner flower plate, and the second end of each web rod is rotatably connected to the outer groove on the middle outer branch of the corresponding outer flower plate. The first end of each bottom rod is rotatably connected to the middle part of the corresponding web rod, and the second end of each bottom rod is rotatably connected to the inner groove on the middle inner branch of the corresponding bottom inner flower plate.

6. The parabolic frame deployable antenna mechanism based on a scissor-type hexagonal frustum unit according to claim 5, characterized in that, The axis of rotation connecting each pair of scissor lifts and the top inner disc coincides with the axis of rotation connecting each pair of upper synchronizing rods and the top inner disc; the axis of rotation connecting each pair of scissor lifts and the bottom inner disc coincides with the axis of rotation connecting each pair of lower synchronizing rods and the bottom inner disc.

7. The parabolic frame deployable antenna mechanism based on a scissor-type hexagonal frustum unit according to claim 1, characterized in that, The connector includes a connecting block, three connecting shafts, a first support base, and a second support base. The three connecting shafts are arranged in an equilateral triangle and are respectively arranged along the long side of the connecting block. The first ends of the first support base and the second support base are rotatably connected to the connecting shafts.

8. The parabolic frame deployable antenna mechanism based on a scissor-type hexagonal frustum unit according to claim 7, characterized in that, The second lug on the outer disc of one of the two adjacent scissor-type hexagonal truncated display units is fixedly connected to the second end of the first support seat in the connector, and the second lug on the outer disc of the other of the two adjacent scissor-type hexagonal truncated display units is fixedly connected to the second end of the second support seat in the connector.

9. The parabolic frame deployable antenna mechanism based on a scissor-type hexagonal frustum unit according to claim 1, characterized in that, The universal joint connector includes a first hinge seat, a second hinge seat, and a cross shaft, and the first hinge seat and the second hinge seat are rotatably connected through the cross shaft.

10. The parabolic frame deployable antenna mechanism based on a scissor-type hexagonal frustum unit according to claim 1, characterized in that, Each pair of lower connecting rods includes a first lower connecting rod and a second lower connecting rod, with the first end of the first lower connecting rod and the first end of the second lower connecting rod rotatably connected. The second end of the first lower connecting rod is fixedly connected to the first hinge seat in the universal joint connector, and the second hinge seat in the universal joint connector is fixedly connected to the first lug of the outer disc on the first scissor-type hexagonal frustum deployable unit in two adjacent scissor-type hexagonal frustum deployable units. The second end of the second lower connecting rod is fixedly connected to the first hinge seat in the universal joint connector, and the second hinge seat in the universal joint connector is fixedly connected to the first lug of the outer disc on the second scissor-type hexagonal frustum deployable unit in two adjacent scissor-type hexagonal frustum deployable units. Connection; each pair of upper connecting rods includes a first upper connecting rod and a second upper connecting rod, and the first end of the first upper connecting rod and the first end of the second upper connecting rod are rotatably connected. The second end of the first upper connecting rod is fixedly connected to the first hinge seat in the universal joint connector, and the second hinge seat in the universal joint connector is fixedly connected to the middle inner branch on the first scissor hexagonal frustum deployable unit in two adjacent scissor hexagonal frustum deployable units. The second end of the second upper connecting rod is fixedly connected to the first hinge seat in the universal joint connector, and the second hinge seat in the universal joint connector is fixedly connected to the middle inner branch on the second scissor hexagonal frustum deployable unit in two adjacent scissor hexagonal frustum deployable units.

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